*{
  padding: 0;
  margin:0 auto;
  font-family: arial,STHeiti,'Microsoft YaHei';
}
a{
  text-decoration: none;
  color:#fff;
}
ul,li{
  list-style: none;
}
.clear{
  clear: both;
}
/****************************导航栏部分**************************************/
.header{
    width: 100%;
    height: 54px;
    top:0px;
    left:0px;
    background-color: #3d444c;
}
.header_wrap{
    width: 1000px;
    height: 100%;
    margin:0 auto;
    background-color: #3d444c;
}
.header_logo{
  margin-top: -5px;
  width: 150px;
  height: 54px;
  float: left;
}
.header_wrap_nav{
    width: 500px;
    height: 100%;
    float: left;
}
.header_wrap_nav > li{
    list-style: none;
    float: left;
}
.header_wrap_nav  > li > a{
    padding:0px 20px;
    color:#ccc;
    text-align: center;
    line-height: 54px;
    text-decoration: none;
    float: left；
}
.header_wrap_nav  > li:hover{
    background-color:#333;
    cursor: pointer;
}
.header_wrap_nav  > li:hover > a{
    color:#00bc9b;
}
.header_wrap_login{
    width: 100px;
    height: auto;
    background-color:#FF411C;
    color:#fff;
    float: right;
    border-radius: 20px;
    text-align: center;
    line-height: 24px;
    margin-top: 13px;
    padding: 3px 5px 3px 5px;
}
.header_wrap_login > a{
    text-decoration:none;
    color:#fff;
    font-size: 14px;
}
.header_wrap_login:hover{
    background-color:#FE6000;
}

/***************************主体部分**********************************/
.main{
    width: 1000px;
    height: 600px;
    margin-top: 60px;
}
/*******************siki课程精选部分*************************/
.siki
{
    float: left;
    height: 540px;
    width: 540px;
    border: 1px dotted #4CAF50;
}

.siki h1
{
    text-align: center;
    font-size: 22px;

}
.img {
    margin: 20px;
    float: left;
    width: 230px; 
    transition: all 0.6s; 
}

.img:hover 
{
    transform: scale(1.05);  
}

.img img 
{
    width: 100%;
    height: 160px;
}

.desc 
{
    background-color: #4CAF50;
    color: white;
    font-size: 16px;
    text-align: center;
    padding: 10px;
}


/*******************垂直菜单部分*************************/
.vertical-menu 
{
    margin-left: 30px;
    float: left;
    width: 400px;
    height: 600px;
}

.vertical-menu a {
    background-color: #eee;
    color: black;
    display: block;
    padding: 12px;
    text-decoration: none;
}

.vertical-menu a:hover {
    background-color: #ccc;
}

.vertical-menu a.active {
    background-color: #4CAF50;
    color: white;
}


button.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

button.accordion.active, button.accordion:hover {
    background-color: #ddd;
}

button.accordion:after {
    content: '\002B';
    color: #777;
    font-weight: bold;
    float: right;
    margin-left: 5px;
}

button.accordion.active:after {
    content: "\2212";
}

div.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}

.use
{
    margin-top: 40px;
}

/* Full-width input fields */
input[type=text], input[type=password] {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

/* Set a style for all buttons */
button {
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    cursor: pointer;
    width: 500px;
}

button:hover {
    opacity: 0.8;
}

.cancelbtn {
    width: auto;
    padding: 10px 18px;
    background-color: #f44336;
}


.imgcontainer 
{
    text-align: center;
    margin: 24px 0 12px 0;
    position: relative;
}

img.avatar {
    width: 40%;
    border-radius: 50%;
}

.container {
    padding: 16px;
}

span.psw {
    float: right;
    padding-top: 16px;
}


.modal {
    display: none; 
    position: fixed; 
    z-index: 1;
    left: 240px;
    top: 0;
    width: 80%; 
    height: 80%; 
    overflow: auto; 
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.4);
    padding-top: 60px;
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto 15% auto; 
    border: 1px solid #888;
    width: 80%; 
}

.close {
    position: absolute;
    right: 25px;
    top: 0;
    color: #000;
    font-size: 35px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: red;
    cursor: pointer;
}

.animate {
    -webkit-animation: animatezoom 0.6s;
    animation: animatezoom 0.6s
}

